1 /* groupdel.c - delete a group
2 *
3 * Copyright 2013 Ashwini Kumar <ak.ashwini1981@gmail.com>
4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
5 *
6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html
7
8 USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
9 USE_GROUPDEL(OLDTOY(delgroup, groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
10
11 config GROUPDEL
12 bool "groupdel"
13 default n
14 help
15 usage: groupdel [USER] GROUP
16
17 Delete a group or remove a user from a group
18 */
19
20 #define FOR_groupdel
21 #include "toys.h"
22
groupdel_main(void)23 void groupdel_main(void)
24 {
25 struct group *grp = xgetgrnam(toys.optargs[toys.optc-1]);
26 char *entry = 0;
27
28 // delete user from group
29 if (toys.optc == 2) {
30 int i, len = 0, found = 0;
31 char *s;
32
33 xgetpwnam(*toys.optargs);
34 if (grp->gr_mem) for (i = 0; grp->gr_mem[i]; i++) {
35 if (!found && !strcmp(*toys.optargs, grp->gr_mem[i])) found++;
36 else len += strlen(grp->gr_mem[i]) + 1;
37 }
38 if (!found)
39 error_exit("user '%s' not in group '%s'", *toys.optargs, toys.optargs[1]);
40
41 entry = s = xmalloc(len);
42 for (i = 0; grp->gr_mem[i]; ) {
43 if (i) *(s++) = ',';
44 s = stpcpy(s, grp->gr_mem[i]);
45 }
46
47 // delete group
48 } else {
49 struct passwd *pw;
50
51 for (endpwent(); (pw = getpwent());)
52 if (pw->pw_gid == grp->gr_gid) break;
53
54 if (pw) error_exit("can't remove primary group of user '%s'", pw->pw_name);
55 if (CFG_TOYBOX_FREE) endpwent();
56 }
57
58 update_password("/etc/group", grp->gr_name, entry);
59 update_password("/etc/gshadow", grp->gr_name, entry);
60 if (CFG_TOYBOX_FREE) free(entry);
61 }
62